The Siemens 3RF3380-1BA26 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated for AC-15 duty at 27.5 A at 40 °C. AC-15 is the IEC 60947-5-1 utilization category for electromagnetic loads (contactors, solenoids, valves) — the rating that governs real-world switching of inductive control circuits, not just resistive heating. The part switches across 48-600 V with a control supply of 110-230 V AC and uses instantaneous switching with screw terminals.
Integration notes
Mounts on DIN rail in a standard control panel enclosure. The 1-pole form factor suits single-phase switching of control transformers, solenoid banks, or small motor contactor coils. The instantaneous switching characteristic means no zero-crossing delay — the output turns on or off immediately with the control signal, which is appropriate for fast-acting loads but may generate higher inrush on inductive circuits.